Henry b



(No Model.)

H. B. -S LATER.' I ARMATURE. No. 374,711. Patented Dec. 13, 1887.

UNITED STATES PATENT OFFICE.

HENRY SLATER, OF DETROIT, MICHIGAN, ASSIGNOR TO THE DETROIT MOTOR COMPANY, OF SAME PLACE.

ARMATURE.

SPECIFICATION forming part of Letters Patent No. 374,711, dated December 13, 1887. Application filed December .29, 1886. Serial No. 222,898. (No modeli To all whom it may concern.-

Be it known that I, HENRY B. SLATER, of Detroit, county of Wayne, State of Michigan,

- have invented a new and useful Improvement in Armatures; and I declare the following to be a full, clear, and exact description of the same, such as willenable others skilled in the art to which it pertains to make and use it, reference being had to the accompanying drawings, which form a part of this specification.

My invention consists of the combinations ofdevices and appliances hereinafterspecified, and moreparticularlypointed outint-he claims. In the drawings, Figure 1 is a side elevation, andFig. 2 a longitudinal cross-section, of an armature embodying my invention. Fig. 3is a separate view of one of the laminze of sheet iron, represented in Figs. 1 and 2 at C. Fig. 4isaseparate view of one of the larger laminae,

shown in Figs. 1 and 2 at 0. Fig. 5 is a longitudinal sectional view of a segment of the armature.

It is the purpose of my invention to produce an armature for dynamo-electric machines, whether primary generators or motors. Said armature is designed to produce the largest surface possible to the field-magnets of a dynamomachine, and admitting of a construction which will permit the pole-pieces to be presented directly to the surface of the bobbins throughout nearly the entire length of the convolutions, while at the same time the core of the bobbins or helices upon the armature is made up of wire wound in the direction of the periphery of the armature and of lamina of sheet-iron laid in the same direc-' tion.

. In carrying out my invention, A represents the spokes or web of the armature-wheel. They are made free at their endsthat is to say, the spokes are not connected in series by a band or periphery, but each spoke has at its end a cross-piece, A, parallel with the axis of the wheel, the length of said cross-piece corresponding with the breadth of the desired armature-ring and removably attached to the spoke. As a convenient means for making this armature, I provide a drum or cylinder having a diameter corresponding with the innor diameter of the armature-ring before the bobbin-wires are wound thereon. This drum or cylinder is suitably recessed to receive the web of the armature-wheel and permit the spokes to project beyond the surface of the said drum or cylinder, the cross picces A be ing removed. I now wind upon this drumin the direction of the rim of the armature an iron wire until there is made up upon both sides of the plane of the spokes the wire rings or hands B and B. I then put the crosspieees A in position and secure them to the ends of the spokes. There will then be recesses left upon the outer surface of the wire rings or bands B and B between the adjacent cross-pieces A. I fill in these spaces from the plane of the spokes out to the edge of the wire rings 01' bands B B with stripsorlaminze O of sheet-iron, and the spaces between the spokes themselves in the plane of the wheel I fill in with similar broader strips or laminae, O, of. sheet-iron. There is thus presented a uniform exterior surface, upon which I proceed to wind in the direction of the rim of the armature the band or ring D of iron wire.

Having thus made up the core of the armature bobbins or helices, I bind them together and wrap them with rubber, clot-h, paper, or other insulating material. The armature is then completed in the usual manner by forming about this core the usual bobbins or helices of wire, as shown at E.

It is apparent that an armature thus constructed presents deep recesses upon both sides of the plane of the spokes, and enables access to be had to the entirelength of each convolu tion of wire in the bobbins o-r helices. It is therefore practicable to cause the pole-pieces of the field-magnets to lap almost completely around the rim of the armaturering, and, being broad and fiat, none of the interior portions of the helix and its core are removed to any considerable distance from the immediate action of the field-magnets. This construction is especially valuable where it is desired to locate the pole-pieces of independent fieldmagnets upon the interior of the rim of the armature-ring, as shown in an application for Letters Patent for dynamo-machine filed by me contemporaneously herewith.

An armature of this construction is open and not liable to heat, while at the same time its rim possesses the marked and well-known ad vantages of the wire and lamina of sheetiron as the core of the bobbins. The web or spokes of the wheel may be made of any suitable material-as, forinstance, brass or malleable iron. This construction carries the spokes and their cross-pieces directly into the middle of the armature-ring, and so makes a very strong and rigid structure, and the spokes themselves are thoroughly braced by the strips or laminae of sheet-iron, O G.

It is not absolutely essential, though preferable, that thecross-pieces A should be removable, for it is apparent that they may be cast solid with the web and spokes, and the inner rings or bands, B B, of wire might be wound separately and adjusted into place. The process I have described, however, is the preferable one, and is that which I propose to cmploy.

What I claim is' 1. An armature fora dynamo-machine, said armature consisting of a series of spokes with cross-pieces at their ends parallel to the axis, and a core made up of wire wound in the direction of the periphery of the armature with fillings of sheet-iron lamina, and said core wound with bobbins or helices of wire in the usual manner, substantially as and for the purposes described.

2. In the construction of armatures for dynamo-machines, the combination, with wires wound in the direction of the periphery of the armature, of laminae or strips of sheet-iron arranged in planes parallel to the plane of the spokes, adapted to fill the otherwise vacant spaces, substantially as and for the purposes described.

3. An armature for a dynamo-machine, said armature consisting of aseries of spokes with removable cross-pieces at their ends parallel to the axis, and a core made up of wire wound in the direction of the periphery of the armature with fillings of sheet-iron lamina, said core wound with bobbins or helices of wirein the usual manner, substantially as and for the purpose described.

4. An armature for a dynamomachine, said armature consisting of a series of spokes with cross-pieces at their ends paralled to the axis, and a core made up of wire bands or rings B B upon the under side of the cross-pieces, and another wire ring or band upon the ontsideof the cross pieces and with fillings of sheet-iron lamina, said core subsequently wound with bobbins or helices of wire in the usual manner,

substantially as and for thepurpose described.

In testimony whereof I sign this specification in the presence of two witnesses.

HENRY B. SLATER. \Vitnesses:

N. S. WRIGHT, J OHN E. WILns. 

